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  --line:#d7cdbb; --accent:#0f6a4b; --accent-dark:#0a4b36; --accent-soft:#e4efe9;
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  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --sans:"Segoe UI","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font-family:var(--sans);background:radial-gradient(circle at 12% 8%,rgba(15,106,75,.12),transparent 36%),radial-gradient(circle at 88% 0%,rgba(180,83,9,.12),transparent 30%),linear-gradient(180deg,#efe6d4 0%,var(--paper) 42%,#ebe4d6 100%)}
button,input,select,textarea{font:inherit}
a{color:var(--accent-dark)}
.skip-link{position:absolute;left:-999px;top:0;background:#fff;color:#000;padding:.7rem 1rem;z-index:100}.skip-link:focus{left:.5rem;top:.5rem}
.igbo-app{max-width:1180px;margin:0 auto;padding:1.25rem 1rem 3rem}
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.course-toolbar{display:flex;flex-wrap:wrap;gap:.6rem;margin:.8rem 0}.course-toolbar input{flex:1 1 16rem}.module-list{display:grid;gap:.8rem}.module-card{padding:0}.module-card>summary{list-style:none;cursor:pointer;padding:1rem;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.7rem;align-items:center}.module-card>summary::-webkit-details-marker{display:none}.module-card>summary h3{margin:0}.module-body{padding:0 1rem 1rem}.lesson-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:.7rem;padding:.62rem 0;border-top:1px solid var(--line);align-items:center}.lesson-row:first-child{border-top:0}.lesson-row button.lesson-link{border:0;background:transparent;padding:0;text-align:left;border-radius:.25rem;color:var(--ink);font-weight:600}.lesson-row button.lesson-link:hover{text-decoration:underline;box-shadow:none}.lesson-number{color:var(--muted);font-variant-numeric:tabular-nums}.lesson-row.current{background:rgba(15,106,75,.05);margin:0 -.5rem;padding-left:.5rem;padding-right:.5rem;border-radius:.5rem}
.objective-list,.plain-list{padding-left:1.25rem}.objective-list li,.plain-list li{margin:.35rem 0;line-height:1.45}.skill-list{display:flex;flex-wrap:wrap;gap:.35rem}.skill{background:#f2eee5;border:1px solid var(--line);border-radius:999px;padding:.22rem .5rem;font-size:.75rem}
.content-table{width:100%;border-collapse:collapse}.content-table th,.content-table td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:.58rem .45rem}.content-table th{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.igbo-line{font-family:var(--serif);font-size:1.45rem;margin:.2rem 0}.source-label{font-size:.73rem;color:var(--warn);font-weight:700}
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.flashcard{min-height:13rem;display:grid;align-content:center;text-align:center;cursor:pointer}.flashcard .front{font-family:var(--serif);font-size:1.8rem}.flashcard .back{margin-top:.8rem;padding-top:.8rem;border-top:1px solid var(--line)}
.recording-box{display:grid;gap:.65rem}.recording-box audio{width:100%}.text-response{width:100%;min-height:5rem;resize:vertical}
.foot{margin-top:1rem;color:#4b5550;font-size:.88rem}.foot p{margin:.4rem 0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:850px){.grid-wide{grid-template-columns:1fr}.module-card>summary{grid-template-columns:1fr}.lesson-row{grid-template-columns:auto minmax(0,1fr)}.lesson-row .status-pill{grid-column:2}.content-table{display:block;overflow-x:auto}}
@media(max-width:640px){.igbo-app{padding:.8rem .65rem 2rem}.panel{padding:.85rem}.top-actions{width:100%}.field{flex:1 1 100%}.field select{width:100%}.tabs{gap:.3rem}.tabs button{font-size:.86rem;padding:.42rem .65rem}.igbo-line{font-size:1.25rem}.course-context{align-items:stretch}.course-context>*{flex:1 1 100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.disclosure>summary::before{transition:none}}
